1/*	$NetBSD$ */
2
3/*-
4 * Copyright (c) 2012 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Alan Barrett
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * ISO/IEC 9899:2011 section K.3.7.4.1 The memset_s function
34 */
35
36#include <sys/cdefs.h>
37
38__RCSID("$NetBSD$");
39
40#define __STDC_WANT_LIB_EXT1__ 1
41#include <errno.h>
42#include <stdint.h>
43#include <string.h>
44
45#undef memset_s /* in case it was defined as a macro */
46#undef memset   /* in case it was defined as a macro */
47
48errno_t
49memset_s(void *s, rsize_t smax, int c, rsize_t n)
50{
51	errno_t err = 0;
52
53	if (s == NULL)
54		return EINVAL;
55	if (smax > RSIZE_MAX)
56		return E2BIG;
57
58	if (n > RSIZE_MAX) {
59		err = E2BIG;
60		n = smax;
61	}
62
63	if (n > smax) {
64		err = EOVERFLOW;
65		n = smax;
66	}
67
68	memset(s, c, n);
69
70	return err;
71}
72